6.4 Maintenance work
6.4.1 Checking the safety equipment
Checking the system pressure
❒ Check the system pressure on the pressure gauge.
➥ The value must be 20% greater than the preload pressure of the expansion
tank.
NOTICE! Check that the position of the pressure gauge and rated pressure of
the expansion tank match your installer's specifications!
If the system pressure decreases:
❒ Add water.
NOTICE! If this happens frequently, the seal of the heating system is faulty! Inform
your installer.
If large pressure fluctuations are observed:
❒ Ask an expert to inspect the expansion tank.
Checking the safety valve
❒ Check the seal of the safety valve regularly and ensure that the valve is not dirty.
NOTICE! Inspection work must be carried out in accordance with the manufactur‐
er’s instructions.
Maintaining the boiler
6
Maintenance work
Owner´s Manual S3 Turbo | B1390016_en-us
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